Thanks chuck; I am guessing that is my problem and I have never cleaned that heat exchanger in my 10 years with Alianna. How much F/W coolant will be let loose? How much salt water will be let loose? You make the job seem easy; approximately how long are the tubes? Why did you choose a wood dowel versus wire?
Dwight Veinot C&C 35 MKII, *Alianna* Head of St. Margaret's Bay, NS [email protected] On Sun, Aug 9, 2015 at 10:35 AM, Chuck S via CnC-List <[email protected] > wrote: > Hi Dwight, > I do have the M4-30 and it when it ran hotter than normal, I clean the > little tubes with 1/8" wooden rods I buy from an art supply or hardware > store. I run my engine at 190 degrees. I thottle back if the temperature > gets above that. > > To clean: > With the engine off and the seacock shut, I remove both ends of the > exchanger and simply push the wooden dowels through a few times. There are > about 30 to 40 tubes, but it's pretty easy. A diesel mechanic recommended > I remove the exchanger and have it acid cleaned to remove any scale from > the fresh water side. I haven't done that. I heard of a product you use > without disassembly, and then you flush it and replace your water and > antifreeze mix. I'll try and find that. > > Chuck > > > ------------------------------ > *From: *"dwight veinot via CnC-List" <[email protected]> > *To: *[email protected] > *Cc: *"dwight" <[email protected]> > *Sent: *Sunday, August 9, 2015 8:20:01 AM > *Subject: *Re: Stus-List Raymarine EV-100 and backbone wiring > > Hi Chuck > > > > I recall reading in one of your C&C posts that you have an M4-30 and that > you dismantled and cleaned the heat exchanger. Is that correct and if so > what did you find inside? I mean how it’s built and was anything clogging > it? Also did you ever do any cleaning/maintenance where the salt water > from the heat exchanger enters the exhuast gas line? My M4-30 runs great > at 1600 rpm but when I run it at higher rpm’s it runs hotter than I think > it should, like at 2500 rpm the temp gage climbs to boiling and sometimes > 220 F but the engine is still smooth and strong, just hotter than I would > like to see. I would like to see more water exiting the boat and I know my > raw water pump is good since I have installed a new impeller with no > noticeable change in performance and I know the raw water feed to that pump > is not blocked, lots of flow into the bilge when I disconnect it from the > pump. Can yo give me any advice from your experience. > > > > Thanks > > dwight > > Dwight Veinot > C&C 35 MKII, *Alianna* > Head of St. Margaret's Bay, NS > [email protected] > > > > _______________________________________________ > > Email address: > [email protected] > To change your list preferences, including unsubscribing -- go to the > bottom of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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